Oxidative modification of skin collagen
Vendula Paculová1, René Lenobel2, Ankush Prasad1
1Department of Biophysics, Faculty of Science, Palacký University, Šlechtitelů 27, 779 00, Olomouc, Czech Republic.
International Journal of Biological Macromolecules
|April 23, 2026
Summary
Oxidative damage to collagen, a key skin protein, causes aging and disease. This study reveals how radicals fragment collagen, leading to skin structure loss and impaired function.
Area of Science:
- Biochemistry
- Dermatology
- Molecular Biology
Background:
- Collagen is crucial for skin structure and function.
- Oxidative damage contributes to skin aging and disease.
- The specific radicals and mechanisms of collagen degradation are not fully understood.
Purpose of the Study:
- To investigate if azocompound-derived peroxyl radicals fragment collagen in skin.
- To identify radical intermediates and fragmentation pathways in collagen.
Main Methods:
- Electron Paramagnetic Resonance (EPR) spectroscopy
- Fluorescence analysis
- Immunoblotting
- Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS) profiling
Main Results:
- Hydrogen abstraction generates carbon-centered radicals from collagen.
- These radicals convert to alkoxyl radicals, which may undergo β-scission.
- This mechanism leads to side-chain detachment and collagen type I fragmentation.
- Evidence includes detection of radicals, hydroperoxides, modified peptides, and collagen fragments.
Conclusions:
- Oxidative fragmentation of collagen significantly impairs skin integrity.
- This process contributes to skin aging and pathological remodeling in diseases.
- Understanding this mechanism is vital for treating skin aging and related diseases.
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